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Slices can be re-sliced, creating a new slice value that points to the same array.

The expression

s[lo:hi]

evaluates to a slice of the elements from lo through hi-1, inclusive. Thus

s[lo:lo]

is empty and

s[lo:lo+1]

has one element.

package main import "fmt"func main() {    p := []int{
   2, 3, 5, 7, 11, 13}    fmt.Println("p ==", p)    fmt.Println("p[1:4] ==", p[1:4])    //missing low index implies 0    fmt.Println("p[:3] ==", p[:3])    // missing high index implies len(s)    fmt.Println("p[4:] ==", p[4:])}

 

package main import "fmt"func main() {    p := []int{
   2, 3, 5, 7, 11, 13}    fmt.Println("p ==", p)    fmt.Println("p[1:4] ==", p[1:4])    //missing low index implies 0    fmt.Println("p[:3] ==", p[:3])    // missing high index implies len(s)    fmt.Println("p[4:] ==", p[4:])    var a [2]string    a[0] = "Hello"    a[1] = "World"    fmt.Println(a[0:1])}